242 



SCHOOL ENTOMOLOGY 



struct! ve species in that State. The Two-striped Locust * 

 is somewhat larger and is characterized by two yellowish 

 stripes extending from the eyes along the sides of the head 

 to the extremities of the wing-covers. Our largest winged 



species is the Ameri- 

 can Acridium.^ It 

 is a Southern spe- 

 cies, being common 

 south of the Poto- 

 mac and Ohio rivers, 

 where it has often 

 become quite de- 

 structive. 



Throughout the Mississippi Valley from Illinois south- 

 ward, the Differential Locust J has become one of the most 

 common and destructive species and its habits may be de- 

 scribed to illustrate those of most of the other common 



FIG. 167. The two-striped locust (Mela- 

 noplus bivittatus Scud.). (After Riley.) 



FIG. 168. The American acridium (Schistocerca americana Scud.). 

 (After Riley.) 



species. The young grasshoppers hatch in late spring and 

 are a dusky brown color, marked with yellow, resembling 

 the adults in shape, but lacking wings. During their growth 



* Melanoplus bivittatus Scud, 

 t Schistocerca americanus Scud. 

 J Melanoplus differentialis Thos. 



